/*
 * Copyright (C) 2005-2011 MaNGOS <http://getmangos.com/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef _WORLDMODEL_H
#define _WORLDMODEL_H

#include <G3D/HashTrait.h>
#include <G3D/Vector3.h>
#include <G3D/AABox.h>
#include <G3D/Ray.h>
#include "BIH.h"

namespace VMAP
{
	class TreeNode;
	struct AreaInfo;
	struct LocationInfo;

	class MeshTriangle
	{
		public:
			MeshTriangle() {};
			MeshTriangle(G3D::uint32 na, G3D::uint32 nb, G3D::uint32 nc): idx0(na), idx1(nb), idx2(nc) {};

			G3D::uint32 idx0;
			G3D::uint32 idx1;
			G3D::uint32 idx2;
	};

	class WmoLiquid
	{
		public:
			WmoLiquid(G3D::uint32 width, G3D::uint32 height, const G3D::Vector3 & corner, G3D::uint32 type);
			WmoLiquid(const WmoLiquid & other);
			~WmoLiquid();
			WmoLiquid & operator=(const WmoLiquid & other);
			bool GetLiquidHeight(const G3D::Vector3 & pos, float & liqHeight) const;
			G3D::uint32 GetType() const { return iType; }
			float* GetHeightStorage() { return iHeight; }
			G3D::uint8* GetFlagsStorage() { return iFlags; }
			G3D::uint32 GetFileSize();
			bool writeToFile(FILE* wf);
			static bool readFromFile(FILE* rf, WmoLiquid *&liquid);
		private:
			WmoLiquid(): iHeight(0), iFlags(0) {};
			G3D::uint32 iTilesX;  //!< number of tiles in x direction, each
			G3D::uint32 iTilesY;
			G3D::Vector3 iCorner; //!< the lower corner
			G3D::uint32 iType;    //!< liquid type
			float* iHeight;  //!< (tilesX + 1)*(tilesY + 1) height values
			G3D::uint8* iFlags;   //!< info if liquid tile is used
#ifdef MMAP_GENERATOR
		public:
			void getPosInfo(G3D::uint32 & tilesX, G3D::uint32 & tilesY, G3D::Vector3 & corner) const;
#endif
	};

	/*! holding additional info for WMO group files */
	class GroupModel
	{
		public:
			GroupModel(): iLiquid(0) {}
			GroupModel(const GroupModel & other);
			GroupModel(G3D::uint32 mogpFlags, G3D::uint32 groupWMOID, const G3D::AABox & bound):
				iBound(bound), iMogpFlags(mogpFlags), iGroupWMOID(groupWMOID), iLiquid(0) {}
			~GroupModel() { delete iLiquid; }

			//! pass mesh data to object and create BIH. Passed vectors get get swapped with old geometry!
			void setMeshData(std::vector<G3D::Vector3> &vert, std::vector<MeshTriangle> &tri);
			void setLiquidData(WmoLiquid* liquid) { iLiquid = liquid; }
			bool IntersectRay(const G3D::Ray & ray, float & distance, bool stopAtFirstHit) const;
			bool IsInsideObject(const G3D::Vector3 & pos, const G3D::Vector3 & down, float & z_dist) const;
			bool GetLiquidLevel(const G3D::Vector3 & pos, float & liqHeight) const;
			G3D::uint32 GetLiquidType() const;
			bool writeToFile(FILE* wf);
			bool readFromFile(FILE* rf);
			const G3D::AABox & GetBound() const { return iBound; }
			G3D::uint32 GetMogpFlags() const { return iMogpFlags; }
			G3D::uint32 GetWmoID() const { return iGroupWMOID; }
		protected:
			G3D::AABox iBound;
			G3D::uint32 iMogpFlags;// 0x8 outdor; 0x2000 indoor
			G3D::uint32 iGroupWMOID;
			std::vector<G3D::Vector3> vertices;
			std::vector<MeshTriangle> triangles;
			BIH meshTree;
			WmoLiquid* iLiquid;

#ifdef MMAP_GENERATOR
		public:
			void getMeshData(std::vector<G3D::Vector3> &vertices, std::vector<MeshTriangle> &triangles, WmoLiquid* &liquid);
#endif
	};
	/*! Holds a model (converted M2 or WMO) in its original coordinate space */
	class WorldModel
	{
		public:
			WorldModel(): RootWMOID(0) {}

			//! pass group models to WorldModel and create BIH. Passed vector is swapped with old geometry!
			void setGroupModels(std::vector<GroupModel> &models);
			void setRootWmoID(G3D::uint32 id) { RootWMOID = id; }
			bool IntersectRay(const G3D::Ray & ray, float & distance, bool stopAtFirstHit) const;
			bool IntersectPoint(const G3D::Vector3 & p, const G3D::Vector3 & down, float & dist, AreaInfo & info) const;
			bool GetLocationInfo(const G3D::Vector3 & p, const G3D::Vector3 & down, float & dist, LocationInfo & info) const;
			bool writeFile(const std::string & filename);
			bool readFile(const std::string & filename);
		protected:
			G3D::uint32 RootWMOID;
			std::vector<GroupModel> groupModels;
			BIH groupTree;

#ifdef MMAP_GENERATOR
		public:
			void getGroupModels(std::vector<GroupModel> &groupModels);
#endif
	};
} // namespace VMAP

#endif // _WORLDMODEL_H
